Well, this is sure to raise a few eyebrows here and there. Today, at the Ubuntu Developer Summit, Mark Shuttleworth held his keynote speech, and in it, he announced that Ubuntu will switch to the Unity user interface come release, for both the netbook as well as the desktop, leaving the GNOME user interface behind (but keeping the GNOME platform).

All use the "latest" GTK+ libs for their time.
*3D can be accomplished with 2D drivers with LLVM-Pipe, however slowly.
Wayland requires toolkit-side rendering which is the expected implementation for Windicators.